ACID [as-id] What it is: Substances with a pH value less than 7. The opposite of alkaline. VIDEOS RELATED TO THIS TERM David Fowler Loading the Polish Brush Russian Almond: File to Finish LEARN MORE TERMS DOTTING TOOL INSURANCE LED LAMP OLIGOMERS GEL BRUSH DUST COLLECTOR ARTIFICIAL NAIL PEDICURE CUTICLE FREE EDGE MANICURE BRUSH FUNGUS FOIL SECONDARY COLORS EPIDERMIS REBALANCE RUSSIAN ALMOND ALLERGEN CROSS-LINK ALLERGIC DOTTING TOOL INSURANCE LED LAMP OLIGOMERS GEL BRUSH DUST COLLECTOR ARTIFICIAL NAIL PEDICURE PrevNext